UIViewController+someting

SubedViewController

 @interface SubedViewController :UIViewController
#import "UIViewController+TutorialView.h"


@implementation SubedViewController

-(void)removeTutorialImage {
    if (imageContainer){
        [imageContainer removeFromSuperview];
        imageContainer = nil;
    }
}
 
-(bool)isTutorialOn{
    if (imageContainer) {
        return true;
    }
    return false;
}
 
- (void)viewDidUnload {
    _infoButton = nil;
    [super viewDidUnload];
}

TabViewController

#import "UIViewController+something.h"

UINavigationController *previousViewController = (UINavigationController*)self.selectedViewController;

if ([previousViewController isTutorialOn]) {
        [[previousViewController visibleViewController] removeTutorialImage]; //Should call SubedViewController
    }

UIViewController+someting

#import <UIKit/UIKit.h>

@interface UIViewController (TutorialView)

-(void)showTutorialView;
-(void)removeTutorialImage;
-(bool)isTutorialOn;
@end

#import "UIViewController+TutorialView.h"


@implementation UIViewController (TutorialView)

-(void)showTutorialView {
   }
-(void)removeTutorialImage {
}

-(bool)isTutorialOn{
    return false;
}

@end